Tying machine



B. H. BUNN March 19, 1935.

TYING MACHINE Filed Dec. 16, 1933 6 Sheets-Sheet 1 r e J y 7 0 .m j Jn 3./ a .a @E0 v@ y HWMHIHMWV F. Tw /wf Twan M W 2 w MWE- m 2 www d. l N w mi w M W M W Q l -HEI Ill M M M/ v w M March 19,'1935. B. H. BUNN TYING MACHINE Filed DecQls, 193s e sheets-sheet 2 B. H. BUNN TYING MACHINE 6 Sheets-Sheet 3 Filed Dec. 16, 1933 nlnllllnunll. Illl HIUP l.

-n MM I l MH m I 0 0 Illzrlll|||V|I|I1||I| m ma m 5 nk 1 Lf l IVM 0 |I. 1 6 mw 1 u j w I6 w |ll.. F I RU r B. H. BUNNV TYING MACHINE March 19, 1935 Filed Deojle, 193s 6. Sheets-Sheet 4 v Marh 19, 1935. B. H. BUNN 1,994,453

TYING MACHINE Filed Dec. 1e, 1953 s sheets-sheet 5 March 19, 1935.

B. H. BUNN TYING MACHINE Filed Dec. 16, 1935 e sheets-sheet e Patented Mar. 19, 1935 i TYING MACHINE i Benjamin ll. Bunn, Chicago, lll., assignor to B. H. Bunn .CompanyLChicaga Ill., a corporation ot Illinois' ApplicationDecember 16, 1933,' Serial No. 702,673

In my Patent No. 1,606,290 of November 9, 1926, My present machine is easily modied to pro- I have quite fully disclosed a tying machine for duce other arrangements of wraps-one wrap wrapping twine around a bundle and tying and each way with a single knot or two wraps each severingthe string. I have now invented a tying way with a single knot.

5 machine which is in many respects an improve- The foregoing, together with further objects,l 5

. ment on the tying machine of my patent.' My features and advantages of my invention, are set .new tying machine may employ much of the yforth in the following description of specific emstructure and operation of that of vmy patent. bodiments thereof, and illustrated in the accom- Therefore, in disclosing mypresent invention I panying drawings, wherein:

l shall refer extensively to my prior patent for de- Fig. 1 is a front elevational view ofthe machine 10 tails of the mechanism and its operation. in its normal position, and is similar to Fig. 1 of One feature of my invention is that the bundle my patent; to be wrapped can 'be turned manually through Fig. 2 is a vertical sectional view taken on the ninety degrees where one wrap is to be longiline 2--2 of Fig. 1, looking toward the wrapper l5 tudinal and the other transverse. To facilitate arm end of the machine, with the parts also in 15 this turning operation I arrange the machine so their normal positions, and is similar to Fig. 2 of that it makes one 4wrap and then stops while the my patent; operator turns the bundle in the other direction, Fig. 3 is a plan View of the machine with the when the machine can then make the other wrap. parts also in their normal position, and is simi- My present machine is peculiarly advantageous lar t0 Fig 5 Ofmy patent, e portion of the guard 20 for wrapping bundles of non-rectangular con-l for the Wrapping arm drive being broken away tours such as are so often encountered in stacks of along the line 3 3 of Fig. 1; odd shaped labels which have to be wrapped. Fig. 4 is a vertical sectional view taken on the 'I'he longitudinal and transverse wraps need not line 4 4 of Fig. 1, looking in a direction opposite y beat right angles. from Fig. 2, showing the parts also in their nor- 25 Preferably my present machine is arranged to malA position, .and iS Similar to Fig- 21 of my make an initial single wrap longitudinally ofthe patent; f bundle and then, after the bundle is turned Fig.- 5 is a fragmentaryv vertical sectional view through ninety degrees, (or whatever odd angle taken on the line 5-5 of Fig. 3, looking toward may be required) to make a doublethat is, two the knotter and clutch control mechanism, but 30 consecutive single-transverse wraps, with a sin- Showing the machine out of its normal position gle knot for the three wraps. Where' the bundle and in the position assumed in the operation at has considerable length in proportion toits width, the time the knotter operating sector has just asin the case of the standard sized long envelope, come into engagement with its cooperating knot-A -UNITED STATES. PATENT oFF'lcE the advantage of making the longitudinal wrap ter operating pinion, and is similar to Fig. 8 of 35 first is that an accurate centering of the longimy patent; tudinal wrap is more necessary because of the Fig. 6 is a fragmentary Veriiool Sectional View greater likelihood of the longitudinal Wrap worktaken on the line 6-6 of Fig. 2, Showing the Perils ing off the end corners. Where the bundle is in their normal position, and is similar to Fig. 4

4o manuauy positioned, setting the bund1e for the of my patent. except that theview is looking in 40 longitudinal wrap rst insures a more accurate the opposite direction from that in the latter?. position than the centering after the bundle is Fig. '7 iS a fragmentary elevation Similar to the turned. If the longitudinal Wrap be nrst, then uppermost part of Fig. 2 but Showing a modified the transverse wraps tend to hold the longitudinal arrangement of drive sprockets for the' wrapping -15 wrap against moving transversely. There is not arm to produce a double wrap-one longitudinal 45 so much danger of the transverse wraps sliding Wrap and one transverse Wrap; ,l 1 oi the package because the transverse wrap, even Fig. 8 is an elevation of the cam disc of Fig. though not accurately centered longitudinally of 5 on a reduced scale and showing the modified the bundle, is still a long way from either end. arcuate 'position ofY one ofthe cam blocks' there- 5*' There is not much chance ofthe transverse wraps of as required for use with the modified sprockets 50 shifting far enough to pass over an `end corner of Fig. 7; and

and come loose. If rthe bundle is to have the se- Figs. 9 and 10 are similar to Figs. 7 and 8 recurity of a triple wrap, it is more economical of spectively, except that they show modifications twine to have the two wraps transverse and the giving a quadruple wrap-two transverse wraps single wrap longitudinal. and two longitudinal wraps. y 5&5v

I shall refer the reader to my prior patent for a more complete illustration and description of the structure and function of those parts of my present machine which are the same as those in the machine there disclosed. For the. reader's convenience in referring from this specification back to my patent, I shall use the sameV reference characters in this application as used in my prior patent where they refer to the same or essentially the same parts, and for reference characters indicating new parts of myA present ma" chine not found in my prior patent I shall prefix the reference characters with the letter N. Reference characters thus prexed with N will not necessarily have any analogy to the reference characters of my patent. I shall summarily describe so much of my present machine as is common to that of the patent.

'I'he machine is built upon a suitable frame 50. The operating motor 52, which maybe controlled by a conveniently located switch, and which may be kept running continuously, carries a motor pinion 54 which drives a gear 55 which normally idles on a shaft 56. A clutch 57, when engaged, will cause the gear 55 to drive its shaft 56, which in turn carries a pinion 61, driving a gear 62 fixed on shaft 63.

The clutch 57 is engaged and released by an arm 60, and this in turn is thrown into operation by depressing the treadle 110, which works through the vertical treadle rod 111, bellcrank 112 (Fig. 5) and the arm or link 115 against the tension of the retractile spring 114. Once the treadle has caused the clutch to engage, the shaft 63 will rotate in the direction of the arrow (Fig. 5), which, it will be remembered, shows the parts out of their normal position. A cam block mounting disc 107 is carried on the shaft 63.

In my prior patent, once the clutch had been engaged by operating the treadle, the motor would drive the shaft 63 and the disc 107 completely around until the cam block 108 engaged the roller on the end of the arm 115, which threw out the clutch. In my present machine I add an additional cam block N108. This results in throwing out the clutch after the shaft 63 has rotated only some ninety degrees.

What happens during that initial ninety degrees rotation of the shaft 63 I shall now describe.

Referring to Figs. 1, 4 and 6, the gear 62 is of double face, the face toward the right (Fig. 1) having teeth about the entire circumference, while the face to the left has a mutilated sector whose mutilation is arcuately substantially 'oo extensive with lthe smooth surfaced arcuate ledge projection indicated herein as 62 (Fig. 4).

The right face of the gear 62 is engaged by pinion 61. "I'he left or mutilated face is aligned with a pinion 85, and the unmutilated teeth of the latter face engage the pinion 85. The pinion in my prior patent drove the wrapper arm shaft, but in my present machine it is only an intermediate drive gear. It carries the rollers which engage the arcuate ledge 62' t0 hold the pinion 85 against rotation while the lattervcomes at the mutilated sector of the gear 62. The journaling shaft on which the pinion 85 is fixed also carries a. sprocket N10 drivingly connected by a chain N11 with a second sprocket N12 which, as shown in Fig. 6, is fixed on the wrapper arm shaft 86. During the previously mentioned initial rotation through some ninety degrees ofthe shaft 63, the unmutilated sector of the gear 62 drives the pinion 85 through two-thirds rotation.'l As the sprocket wheels N10 and N12 have a ratio `of three to two, this gives the wrapping arm a complete revolution, at the end of which the clutch is released until the operator again depresses the treadle.

I shall next describe what this initial rotation of the wrapping arm accomplishes on the bundle. First I shall describe the support upon .which the bundle rests. I might explain that in my present machine the bundle supporting or work surfaces are entirely free of obstructions, permitting 'a ready shifting and turning of the bundle as desired. I dispense with the compressor 82 and the ejector 202 of my patent along with the operating mechanism therefor, including the vertically reciprocating rod 73, the actuating arm 67 therefor, the rock shaft y66, the arm 65 andthe cam channel 64 in the gear 62 in my prior patent. However, certain phases of my invention are not inconsistent with the retention of the compressor and ejector.- l

The main or stationary table 84 is clear of all obstructions, leaving the bundle B, placed thereon, free to be shifted or rotated wherever desired. The island portion 98 of the top surface is of more extended area than in my patent and is pivotally mounted (Fig. 6) upon the wrapper arm 86, alv

though in ya slightlydifferent manner. The

island top 98 carries a vertical back plate N13,`

which functions somewhat as the stop disc 104 of my patent. It carries a trunnion N14 which is nonslidably journaled in an extensipn of the hub 89 of the wrapper arm 92. Thus, while the island top is supported on the rotating hub'and shaft of the wrapper arm, it does not rotate with them. The stops 102 'and 103 (Fig."6) 4on the frame are engageable by a stop arm 101 depending from the island table 98 to keep the latter from rotating in either degrees.

The twine is led from a spool 94 through a friction guide 96 and through the hollow center direction more than a fewgap between the stationary top 85 and the island top 98, the envelopes being more or less centered as regards the vertical plane passing through the axis of the 'wrapper arm shaft 86. The bundle is centered transversely on the said gap or slot. The initial rotation of the wrapping arm during the initial rotation of the shaft 63 through some ninety degrees, as previously explained, carries the twine completely around the bundle to form the first or longitudinal wrap of the tr'.p1el

The length of string necessary to encir- 'cle the bundle is, of course, pulled out from the Wrap.

spool 94 against the friction of the friction guide Referring to Fig. 3, since the crossed end of the first wrap comes on the readers side of the initial reach of twine anchored .to twine catcher 123, in order to` engage the two reaches of twine .to start the transverse wrap, it is necessary that the bundle be turned clockwise (Fig. 3). This the operator does manually, rotating the bundle through ninety degrees clockwise and aligning the left lateral edge of the bundle (Fig. 3) with the left lateral edge of the island 98, which brings A make two transverse wraps and tie the twine,

the operator again depresses the treadle 110 to release the clutch control arm 90, which has been held out of engagement by the cam block N106.

' It will be seen from Fig. 105 that once the clutch release lever 60 has been returned to engaging position by release from the action of the cam block N108, the cam disc 107 together with the shaft 63 can rotate some two hundred and seventy degrees before the cam block. 108 again throws the clutch out of engagement. During the flrst part of that two hundred and seventy degrees -of movement, the two transverse wraps of twine are made, and during the remainder the knot is formed.

While the machine has been stopped by the disengagement of the clutch by the cam block N108 following the first wrap, during which time the operator turns the package into position for the transversewrap, the wrapping arm has been held in its normal arcuate position by the engagement of the then stationary gear 62 with the pinion 85, and is not held stationary by the rollers 105 on the pinion 85, because the rollers are then out of engagement with the cooperatng projection 62' on the gear 62.

As the shaft 63 again rotates, the wrapping arm is driven around two more times, making the double'transverse wrap on the bundle. On each wrap the twine slips between the stop 102 andr the stop arm 101 on the island top 98. By the time the second wrap is completed the rollers 105 on the wrapper arm drive pinion and the projection 62' and the gear 62 have come into engagement and the pinion 85 has come to the mutilated face of the gear 62, with the result that the rollers then hold the wrapper arm in its normal arcuate position during the remainder of the cycle of the machine, that is, during the knotting. As in my former patent, just before the final wrap is completed, the end 136 of the U- shaped member (Figs. 3 and 5) is withdrawn to permit the twine to be caught by the twine catcher 123 'along with the original end of the twine, this being accomplished by the cam 12615 engaging ythe roller 130 on the bellcrank 127, which shifts the plate 132 carrying the Amember 135.

By the time the second transverse wrap is completed, the cam disc 107 has been rotated to the arcuate position where the roller on the depending arm of the knotter carrier 148 enters the cam slot 152 of the cam disc 107 and tilts the carrier 148 about its pivot, throwing the knotter beak 159, forwardly (Fig. 5) to engage the then side by side reaches of twine which are to be tied together. The gear sector 173 on the shaft 63 then engages-the pinion 172, which, through the bevel gears 168 and 169 rotates the'knotter beak 159, 160. 'Ihe knotter mechanism, during thev rotation of the knotter beak, progresses through the sequence best shown in Figs. 12 to 17 of my prior patent. At the proper time after the parallel reaches of string have been twisted about the hotter beak, the cam 156 causes the jaws of the beak to open and bite the two reaches of string, which are then withdrawn by the beak because of the carrier 148 being rocked back- In the preferred embodi- A wardly again by the cam slot 153 in the camdis'c 107. This withdrawal of the beak pulls out the characteristic loop of the knot. The stripping of the knot and the severing of the string is then done by the knotter mechanism, the reader being referred to my prior patent for a more detailed disclosure of the entire knotter mechanism and operation. The severing of the twine leaves the reach of twine extending from the end of the wrapper arm 92 still anchored on the twine catcher 123. After the knot .has been formed and completed the shaft 63 has rotated the cam disc 107 to the position where the roller 116 on the end of the clutch throw-out arm 60 has reached the cam block N108, which throws out the clutch, permitting the gear 55 to idle on the shaft 56 so long as the motor continues to run.

I'he cycle of operation of the machine then' being completed and the knotted string having been severed, the tied bundle is ready for the operator to remove.

When an unusually small bundle is to be wrapped and it is positioned considerably oif center when being wrapped, there is a. danger that the wrapping arm and bundle will cause an excessive amount of twine to be withdrawn. To

-remedy this I provide a draw back arm N16 which is pivotally mounted upon the wrapper arm near its hub. The twine is run through an eye in the outer end of tlie draw back yarm N16. The arm N16 is normally urged out at an angle to the Wrapper arm by a tension spring N17 between the arm N16 and a bracket N18 rigidly mounted on the hub of the Wrapper arm but rotating therewith. The initial pull on the twine in wrapping a package first pulls this draw backv ,arm down into parallelism with the radial reach of the wrapping arm 92 and then, if required, additional twine is withdrawn through the tenson guide 96. The draw back arm N16 will automatically take up slack within certain limits.

I callparticular attention to the feature of my present machine that it is not ,necessary that the bundle be rotated through ninety ldegrees as the angle between the longitudinal and transverse wraps. In the instance of stacks of odd shapes, such as, for example, diamond shaped labels, the wraps may be made at acute and complementary angles. Also, three parallel wraps, either horizontal or transverse, may be formed with a single knot by depressing the pedal -after the flrst wrap, without turning the bundle.

For the reasons explained in the introduction I to this specification, I generally prefer to make the initial single wrap the longitudinal wrap and first or single wrap a transverse wrap and the double wraps the longitudinal ones.

My present machine is also peculiarly well adapted for tying assorted sizes and shapes and characters of blmdles Vin succession, there be-A ing no adjustment of the machine or any guides necessary.

In Figs. 7 and 8 I have shown the modifications in the ratio of the sprockets and the arcuate position of the cat n block N108 which will give .a double wraponewrap on the flrst depression of the treadle and one wrap on the second depression of the treadle. The sprockets N100. and N12a have a ratio of 1:1. This requires more arcuate movement of the shaft 63 to complete the flrst wrap. This is provided by a greater angle between the cam blocks N108 and 108 (compare Figs. 5 and 8) .v

5 Figs. 9 and 10. Here the sprockets Nla and N12a have the ratio of 2:1 (compare with the ratio 3:2 of the sprockets N10 and N12 of Fig. 2); and

the cam block N108 is in a slightly different angular position with reference to the cam disc 107.

'Ihe simplicity of the changes in the machine to convert it from a triple wrap to a double wrap .or to a quadruple wrap is a feature of my invention.

I claim: j

1. A power operated twine tying machine comprising a wrapper. a knotter, a control lever, a stop for stopping the wrapper after it has made one or more wraps but before operation of the knotter, and mechanism controlled by the lever for initiating operation of the wrapper for the first said wrap or wraps and for re-initiating operation of the wrapper, followed by operation of the knotter after said stopping.

2. The combination with a twine tying machine comprising wrapping and knotting mechanisin which mechanism first forms a plurality of wraps with a string and then knots the string,- of a stop for stopping the operation .of the wrapper afterone or more complete wraps has been U lmairie but before the final wrap or wraps have been made and before the knotter has knotted the string, and a manually controlled lever for setting the mechanism intoeoperation to complete the wraps and knot the string.

8. 'Ihe combination with a twine tying machine comprising wrapping and knotting .mechanism which mechanism first forms a plurality-of wraps with a string and then knots the string,of a stop for stopping the operation of the wrapper f after one or more complete wraps has been made but before the final wraps or wraps have been made and before the knetter has knotted the string, and a manually controlled lever initiating operation of the wrapper and also setting the 451 wrapper into continued operation to complete the wraps and knot the string after said stopping.

4. A power operated tyingmachine comprising a wrapper for forming two or more wraps of string about a bundle, a knotter for knotting the 50 string, stop mechanism for stopping the wrapper after one or more wraps but before the nnal wrap, mechanism automatically vinitiating the operation of the knotter after the nnal wrap, and manually controlled lever means for initiating the opera- 5 tion of the wrapper and for starting the continued operation of the -wrapper after ltermination by the stop mechanism.

5. A twine tying machine comprising a wrapping arm, a knotter, a continuously driven power shaft, s cam shaft having a pair of cams thereon, the cam shaft, during a cycle of the machine, driving the wrapping arm and the knotter, a clutch for engaging the power shaft with the cam shaft, clutch release mechanism operated by said cams, and a manually operable lever for engaging the clutch, the initial yactuation ofl the lever engaging the clutch to drive the wrapping arm to form one or more wraps, at the completion of which one of the cams releases the clutch, and a' second actuation of the lever engaging the clutch to form another one or more wraps followed by actuation of the knetter, at the completion of which the othereamreleasestheelutchtocompletea cycie.

whereby the machine will form two series of wraps with a single knot. v

6. A twine tying machine comprising a wrapping arm, an actuating shaft therefor, a pair of cams rotating in timed relation to the actuating shaft, a power shaft, a clutch between the power shaft and actuating shaft, release mechanism for the clutch actuated by the cams. and a manually operable lever for engaging the clutch, the initial actuation of the lever in the cycle of the machine the clutch to drive the wrapping arm through one or more wraps followed by a release of the clutch by one of said cams, and the second actuation of the lever in a cycle of the machine re-engaging the clutch to drive the wrapper arm to make another one or more wraps followed by a release of the clutch by the other cam within the cycle of the machine.

7. The combination, with a tying machine having a wrapper and a knotter acting in sequence to wrap a bundle with a single twine in two successive series of one or more wraps each and to form a knot in the twine of the two series, of drive means for the wrapper, means for automatically discontinuing the operation of the wrapper for an unpredetermined time at the completion of' each series of wraps, and a manual lever initiating operation of the wrapper after such discontinuance of operation at the completion of the first series of wraps.

8. The combination, with a tying machine having a wrapper and a knotter acting in sequence to wrap a bundle with a single twine in two 'successive series of one orvmore wraps each and to formaknotinthetwineofthetwoleries,ot

drive means for the wrapper, a manual lever'for -initiating the operation of the wrapper by the of twine, in two series of one or more wraps each,'

about va bundle, a power shaft, a rotary drive member for the wrapping arm, a clutch between the' shaft and-,drive member, a pair of cams on the drive member, a clutch release lever engageable by each cam` to disengage the clutch, and a manually controlled lever for engaging the clutch, the respective cams acting to release the clutch after the met series and second series, respectively, of wraps is completed.

10. A tying machine comprising, in combination, a wrappin arm for succeively wrapping a length of twine, in two series of one or more wraps each, about a bundle, a power shaft, a rotary drive member for the wrapping arm, a clutch' between the shaft and drive member, a pair of cams on the drive member, a clutch release lever engageable by each cam to disengage the clutch, a manually controlled lever for ensins the clutch, the respective cams acting to release theclutch after the first series and second series..

annahm n. sums 

